Brothers convince groggy little sister of zombie apocalypse

Big brother's are known for their pranks, but this one took it to the next level.

After their teenage sister had wisdom teeth surgery, older brother's Cabot and Barrett Phillips teamed up to convince her that a zombie apocalypse was hitting their city in Virginia.

And they caught it all on camera.

The video begins by showing sister, Millicent, on her way to get her wisdom teeth removed.

After surgery, while the medication still pumping strong through her veins, the brother's go to work on their prank.

Millicent, sitting in the front seat next to brother Cabot, is clearly loopy after surgery. And when an "emergency alert" comes through the radio in the car, she is all ears.

"The Center for Disease Control in Washington, D.C. has issued a viral outbreak warning," the voice says. "State and local officials have reported cases of high fever, nausea, death and even cannibalism ... stay in place until further notice."

Millicent seems confused, and criticizes her brother for, "driving like a slug."

That's when the brother's begin upping their game -- and even mom gets involved.

Cabot accepts a call from their mom, who tells them they need to get home right away.

"There's some sort of a weird virus outbreak," she says.

After they get home and Cabot exits the vehicle, telling his sister not to move, she can be heard talking to herself.

"What?" she says. "Like cannibals ... zombies?"

Her brother then begins packing the car with essentials to take on the zombies, like a garden-hoe. But Millicent is not feeling Cabot's zombie fighting weapon choice.

"A garden-hoe isn't what we want," she says. "We have guns, why are you putting gardening equipment in our car?!"

But things start to get serious when Millicent is tasked with choosing between bringing her cat or her dog as they flee.

"The cat, you idiot!" she says.

"What do we do with the dog?" her brother Barrett questions.

"He's the worst, he's already dying, leave him, get the cat!" she says.

"Mom said we are leaving the dog," her brother tells her.

"Okay, that's fine," Millicent says.

The insanity continues with Millicent practicing her Spanish speaking skills and having to choose between two kinds of cake to bring along.

Once on the road, when the brother's suggest hitting up Costco before their escape, Millicent is not amused.

"No, it's gonna be a bloodbath in there!" she says.

Eventually, the brother's decide to let their little sister know it was all a prank. And that she can go take a long nap now.

To see the entire ordeal, and Millicent's reaction to it being a prank, watch the video at the top of this article.

And for all those worried about the dog Millicent was ready to leave behind, Cabot cleared that up on Twitter. Millicent loves both her pets.